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MBT as a Raw Material Supplier - 9th ASA Recycling Days Conference

That was the main topic of the 9th ASA Recycling Days Conference which was held from February 29th to March 2nd in Hannover, Germany.

The conference was organized by the Registered Association for Material Specific Waste Treatment ASA e.v., which exists for approximately 15 year as a German Association of plant operators with MBT technology. (MBT: Mechanical Biological Treatment )

The conference was divided in 6 thematic blocks held in German language with a simultaneous translation in English. A parallel session in English was also available the 1st day of the conference. The 3rd day of the conference also included a small outside exhibition and a site visit on an MBT unit.

Almost 300 people attended the conference sessions on Wednesday and Thursday and about 50 people attended the site visit on Friday.

Thomas Grundmann, Conference Organizer, addressed the opening reception of the conference. His address was an amalgamation of current situation of MBT’s process and predictions that lay over the horizon.

Welcome speech of Thomas Grundmann was followed by a welcome speech of H. Wendenburg – Director of German Environment Ministry. The significant role of education in achieving high recycling rates and introducing sufficient waste separation in Germany, was highlighted in his speech. Taking a broad and cross-disciplinary approach to addressing MBT issues in contemporary society, conference session topics included: General speeches regarding MBT process in the introduction session of the conference (Block I). Block II contain political, legal and economic frame conditions with main focus on the EU Waste Framework Directive and the revision of the German Closed Substance Cycle and Waste Management Act were also presented (Block II). In Block III, speakers performed the effects of the (legal) frame conditions, especially those of the Closed Substance Cycle and Waste Management Act. Focus was withdrawn on the development of emissions-trading as well as on the requirements for producers of Refused Derived Fuels and alternatives for RDF production. (RDF : Refused Derived Fuel)

At the second day of the conference developments and chances surrounding the MBT technology were addressed (Block IV). Besides concepts for plant enlargement, respectively conversion of existing technologies, alternative possibilities for RDF utilization e.g. transformation into the “oil” were also been shown. Approaches for the optimization of different processes MBT, MBS or MPS was also presented in Block V. (MBS: Mechanical-Biological Stabilisation ,MPS:Mechanical-Physical Stabilisation)

Lectures were finalized with reports based on experiences with anaerobic digestion of biowaste, presenting the different technologies in Block VI

MBT plants in Germany According to Mr. Thomas Grundmann at present ferrous and non-ferrous metals are segregated in MBT plants in Germany for material recovery. By means of a corresponding separation technology like e.g. near infrared spectroscopy (“NIR”) these plants can be upgraded or retrofitted in a relatively simple way for the generation of further material streams, for example plastics for material recovery as well. Other output streams from plants with MBT technology are Refused Derived Fuels (RDF) for thermal recovery. Combined processes from plants with MBT technology and plants for RDF utilization proved to show high energy efficiency. This efficiency turned out to be higher as higher energy efficiency in the downstream recovery installation is. Latest analyses at the plant operators using MBT technologies proved that in all tested plants effects of environmental protection could be ascertained. The achieved net primary efficiency factors are between 14-50%. Waste management leads in all plants to net CO2 savings. The savings shows the range of -60 to -480 kg CO2-Equ./t of treated waste. High CO2 credits can only be realized in plant combinations with a high efficiency of an optimized recovery of the produced RDF.

Matthias Kϋhle-Weidemeir, owner of Wasteconsult International, has stated: “The MBT operators are currently facing new challenges due to the changed framework conditions, such as strongly fluctuating secondary recourse prices and a fight for the input. Fortunately, due to its flexibility and modular design, it is a major strength of mechanical –biological process that is able to adapt particularly well to changes” See Video 2.

The conference was completed with a site visit at Pohlsche Heide (Hille) MBT on Friday. The participants had the opportunity to have a close look into a modern MBT unit with dry digestion and organic waste processing and composting plant with tunnel anaerobic digestion. (See Video 3). Mr Burkart Schulte, Managing Director of the GVoA mbH Co.KG company operating the unit, provided visitors with detailed information about construction and function of the plant.

As Mr Burkart Schulte has stated: “Our main aim as MBT plant operators is that no waste will be disposed on landfills in future. This can only be achieved through efficient waste segregation at source and continuous technological developments on site.”

In place of the ASA recycling days, there will be a new event from 2013, which will bring together the strengths of the ASA recycling days and the international conference “Waste to Resources” organized by Wasteconsult in one event. The conference will be held on June 2013 under the title “Waste to Resources 2013-5th International Symposium MBT MRF” in Hanover.

The organizers’ expectations is the further growth of a both nationally and internationally unchallenged event on MBT technology. Simultaneously translation in English, France, Spanish and German will be available.